AD670KP - 8-Bit 10 us Dual-Input SAR ADC | Analog Devices
MPN： AD670KP ✓ 啟用中AD670KP 概覽
An ADC converts an analog voltage into a digital code for measurement, control, instrumentation, or data acquisition. The AD670KP belongs to the SAR ADC family: a successive-approximation register compares the input against an internally generated DAC level during successive clock cycles. SAR ADCs are useful where parallel outputs, modest resolution, moderate conversion speed, and integrated signal conditioning are more important than compact serial-interface power savings. The integrated instrumentation amplifier is particularly relevant for sensors and low-level differential signals.
Verified source data identifies the AD670KP as an 8-bit parallel-output ADC with two analog input channels, a 0.195% linearity-error figure, and a 10 microsecond conversion time. The device needs no external components or user trims for full-accuracy operation according to the retrieved datasheet description. Its precision voltage reference supports a self-contained conversion chain, while the three-state output buffer can provide a controlled output state for shared digital buses.
The monolithic bipolar implementation combines analog input conditioning and digital conversion logic in one package. This integration reduces the number of external precision components and simplifies board-level signal-chain design. A parallel 8-bit interface is appropriate for processors, programmable controllers, counters, data loggers, and embedded systems that can latch the converted code directly. Because only 8 bits are available, the converter is better suited to coarse measurements, position feedback, process monitoring, and control loops than to high-resolution signal analysis.
Typical uses include industrial process measurement, sensor-interface systems, panel controls, instrumentation, and embedded data acquisition. The dual inputs allow the converter to monitor more than one analog quantity when system timing and multiplexing requirements permit. Designers should verify input range, acquisition timing, logic levels, reference behavior, and output timing against the current Analog Devices datasheet before fixing the PCB or firmware.
A key integration advantage is that the instrumentation amplifier, DAC, comparator, SAR logic, voltage reference, and tri-state output buffer are combined on one chip. The trade-off is its 8-bit resolution: it provides economical acquisition but cannot distinguish finely spaced analog levels as effectively as a 12-bit or higher-resolution converter.
This page synthesizes the verified AD670KP specifications, sourcing links, application guidance, and replacement limitations. It does not infer unverified electrical limits or invent drop-in substitutes where the available cross-reference data does not establish same-package, pin-compatible alternatives.
直接替換替代品，適用於 AD670KP — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： AD670KP （相同外形與佔位） — 差異在於 Package, External Trim Requirement, Integrated Conversion Elements, Mounting Type, Operating Temperature.
AD670KPZ
✅ 直接替換📋 參考替代品（不在目錄中）
AD670JP
✅ 直接替換聯絡詢價
查看資料表 →AD670KN
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →AD670JZ
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
AD670JN
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →AD670AZ
✅ 直接替換📋 參考替代品（不在目錄中）
AD670KP 最大額定值與電氣特性
| Product Type | 8-bit signal-conditioning analog-to-digital converter |
| Architecture | Successive-approximation register (SAR) |
| 解析度 | 8 bit |
| Analog Input Channels | 2 channels |
| Conversion Time | 10 us |
| Linearity Error | 0.195% |
| Output Format | 8-bit parallel |
| Output Buffer | Three-state |
| Integrated Front End | Instrumentation amplifier |
| Integrated Conversion Elements | DAC, comparator, SAR, voltage reference, and three-state output buffer |
| Technology | Bipolar monolithic |
| 封裝 | 20-terminal PLCC |
| 安裝類型 | Surface mount |
| Grade | K grade |
| 工作溫度 | 0°C to +70°C |
| External Trim Requirement | None required |
AD670KP 20-terminal plcc 腳位配置指南
AD670KP（20-terminal plcc 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： AD670KP.
請參閱 資料表 以查看完整腳位配置。
典型應用
AD670KP 適用於 7 應用s: Industrial Process Monitoring, Embedded Sensor Acquisition, Panel and Control Systems, Laboratory Instrumentation, Data Logging and Acquisition, Audio-Style Level Measurement, Digital Control and Thresholding.
Industrial Process Monitoring
The AD670KP fits basic industrial process monitoring where an 8-bit code, approximately 10 µs conversion time, and integrated instrumentation-amplifier front end provide enough resolution for supervisory control. A controller can launch a conversion, latch the 8-bit parallel result, and apply thresholding without a separate reference or external trim network. The 0°C to +70°C K-grade range suits indoor equipment. Designers must verify the actual analog input range and calibration margin because the supplied data does not quantify input-referred accuracy.
推薦
Embedded Sensor Acquisition
The AD670KP is suitable for embedded sensor acquisition when 8-bit resolution is adequate and the sensor signal can use the converter's integrated instrumentation-amplifier front end. Its complete monolithic signal path includes a DAC, comparator, SAR, precision reference, and tri-state output buffer, helping reduce external analog support circuitry. The 10 µs conversion time is useful for routine telemetry rather than high-rate waveform sampling. Firmware must interpret quantization as 256 output levels and preserve enough sensor headroom to avoid saturation.
推薦
Panel and Control Systems
The AD670KP can digitize control-panel or position-feedback signals for embedded logic using its direct 8-bit parallel interface. The three-state output buffer helps when bus control is required, while the approximately 10 µs conversion time supports responsive supervisory loops and operator-panel polling. The K-grade 0°C to +70°C specification aligns with ordinary indoor controls. Confirm propagation timing and logic-level compatibility from the datasheet before connecting the output directly to a modern 3.3 V microcontroller.
推薦
Laboratory Instrumentation
The AD670KP can serve as the acquisition element in compact laboratory or educational instrumentation when the measured signal requires only 8-bit resolution. Its integrated instrumentation amplifier, reference, SAR converter, and three-state output buffer provide a compact measurement chain, and the 10 µs conversion time supports repetitive panel updates. The part is better suited to coarse voltage, position, or threshold measurement than precision bench analysis. Calibration and input-range decisions remain dependent on the full manufacturer datasheet.
推薦
Data Logging and Acquisition
The AD670KP is appropriate for low-speed data-logging channels that require an integrated converter and a simple parallel data path. A microcontroller or CPLD can latch each 8-bit code, scale it in fixed-point arithmetic, and append it to a record. The verified 10 µs conversion time indicates modest acquisition bandwidth, while two analog input channels can expand channel count if the system's multiplexing and settling requirements allow. Use the tri-state output only after confirming bus ownership and timing in the datasheet.
推薦
Audio-Style Level Measurement
The AD670KP can be evaluated for slow audio- or vibration-level monitoring where the objective is a compact 8-bit measurement, not high-fidelity waveform conversion. The instrumentation-amplifier front end, internal reference, and 10 µs conversion time provide a self-contained path into a parallel digital system. Its resolution limits precise level discrimination, and the verified data does not specify bandwidth, noise, or input range. Those characteristics must be confirmed from the manufacturer datasheet before selecting it for audio signal measurement.
推薦
Digital Control and Thresholding
The AD670KP is useful in simple digital control loops where the microprocessor needs a compact comparison value rather than a full-resolution measurement. A control algorithm can read the 8-bit parallel code and switch actuators when thresholds are crossed, while the approximately 10 µs conversion time offers much faster updates than many slow sensor loops. The integrated three-state output buffer may simplify shared-bus control. Engineers should verify input settling, conversion-control timing, and digital logic thresholds before implementing direct feedback control.
推薦
推薦產品摘要
工程參考資料，適用於 AD670KP — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | AD670KPZ | AD670JP | AD670KN | AD670JZ | AD670AZ |
|---|---|---|---|---|---|---|
| Package | 20-terminal PLCC | 20-terminal PLCC claimed by candidate listing; verify physical drawing | 20-terminal PLCC family option; verify exact suffix | 20-terminal PLCC family option; verify exact suffix | 20-terminal PLCC family option; verify exact suffix | 20-terminal PLCC family option; verify exact suffix |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Analog Inputs | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels | 2 channels |
| Output Format | 8-bit parallel | 8-bit parallel | 8-bit parallel | 8-bit parallel | 8-bit parallel | 8-bit parallel |
| Technology | Bipolar monolithic | Bipolar family implementation | Bipolar family implementation | Bipolar family implementation | Bipolar family implementation | Bipolar family implementation |
| External Trims | None required | None required per AD670 family description | None required per AD670 family description | None required per AD670 family description | None required per AD670 family description | None required per AD670 family description |
主要差異化特點
- Complete monolithic signal-conditioning chain (對比AD670KPZ)
- Parallel acquisition interface (對比AD670JP)
- Commercial K-grade temperature coverage (對比AD670AZ)
- Modest conversion interval for embedded measurement (對比AD670KPZ)
設計說明
Treat the eight digital outputs as a short, latched parallel bus rather than a high-speed transmission line. Confirm output timing, propagation delay, logic levels, and setup requirements from the Analog Devices datasheet before connecting the converter to a microcontroller. If the bus is longer than necessary or operates near the system's clock limit, shorten it, keep it away from switching-node copper, and add source-series damping only after signal-integrity testing.
Keep analog input and reference routing compact and away from digital output and switching-regulator traces. The verified feature set confirms an internal reference and instrumentation-amplifier front end, but it does not provide grounding or layout values. Use a continuous ground plane, return digital-output current locally, and follow the manufacturer's recommended pin arrangement and bypass requirements after obtaining the complete AD670 datasheet.
Do not infer full-scale input voltage, supply limits, acquisition time, or logic thresholds from the 8-bit resolution and 10 µs conversion-time descriptions. The supplied data does not include those values, and substituting guesses can damage the analog input or cause incorrect acquisition timing. Before schematic release, verify input range, analog and digital supplies, conversion-start behavior, output coding, and absolute maximum ratings in the manufacturer documentation.
Separate analog and digital return-current paths as far as practical, then join them according to the datasheet's recommended grounding topology. The verified data does not state supply voltage or current, so power consumption cannot be calculated responsibly. Estimate only after obtaining operating current and voltage from the datasheet; until then, treat battery-life and thermal claims as unknown rather than deriving them from conversion time.
合規資訊
The supplied web data does not include explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations for AD670KP. AEC-Q100 is reported as unknown because this field otherwise accepts only qualified, not_qualified, or not_applicable.
